Vines is working with the school district and county health department to monitor the outbreak.

She is telling families that kids should know if they're going to get sick within 12 hours of exposure. In other words, if they weren't not sick by Saturday afternoon or evening, they probably weren't exposed.

The virus takes 24 to 48 hours to pass.

"Once you start feeling better, the clock starts," said Vines, who added infected people should stay at home at least 24 hours after they start feeling better.

Families should stay away from nursing homes or similar venues with elderly people, since those are ripe for the virus to spread.